The objective of this lab was to determine the molarity and percent solution of a solution with an unknown concentration.

Background:

Molarity is the number of moles of a solute per liter of a solution. Percent solution is the percentage of a solute in a specific mass or volume of a solvent. A solute is a solid that gets dissolved in a solvent or a liquid that is a smaller amount than the solvent. A solvent is a liquid that dissolves the solute and it always is a larger amount. Solvation is when solute particles are surrounded by solvent molecules. A lab technique that was used during the lab was to boil the solution in order to separate the solute from the solvent.

1. Obtain the solution with the unknown concentration from Mrs. Magdaleno. 2. Measure the volume of the solution by pouring it in the 10mL graduated cylinder. Use the pipette to take out solution in the graduated cylinder until the volume was at 6mL. Record it in the data table. 3. Measure the empty 100mL beaker using the scale. Record it in the data table. 4. Pour the solution in the 100mL beaker.

5. Find the mass of the beaker and solution using the scale. Make sure to subtract original beaker mass from the mass of the beaker and solution. 6. Boil the solution to separate the solute from the solvent by using the hot plate set to nine. 7. Once all the water has evaporated use the hot grips to remove the beaker from the hot plate and let cool. Find the mass of the beaker and solute using the scale. Make sure to subtract beaker mass from the beaker and solute mass. 8. Use the data from the data table to solve for molarity and...

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4. Was there a control group in this experiment? Explain.
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References 22
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Abstract
This experiment was performed in order to determine the molarity of a solution and the percent by mass of acetic acid, CH3COOH in vinegar. Acetic acid is monoprotic and belongs to the carboxyl family of organic compounds. The titration method is used to neutralize the acids by using the standardized sodium hydroxide solution. It reacts with bases which is sodium hydroxide,...

...September 19, 2014
Period 4
Lab #1: Density Determinations for Solutions
Theory:
The density of a sample of matter is very useful when trying to find the identity of an unknown substance. The units of density are quoted in (g/mL) for liquid samples of matter. For that reason if the volume is known of a liquid, determining its density is easily determined by weighing it accurately.
Density can also be used as a tool for finding the concentration of...

...we can then calculate the water evolved. The first method we use to determine the percent composition is Gravimetric. With this method we use the mass of the reactant and the mass of the product. Another way to acquire the percent composition is by the Volumetric Method. This method requires measuring the water displaced by the O2 gas. If the experiment is done correctly, we should be able to calculate the percent composition of KClO3 by using both...

...﻿Percent Copper in Brass
Background
The scientific concepts involved in this lab include Spectroscopy, Beer’s law, Calibration curve, concentration, and electronic transitions. The main objective of this experiment is to see how the percent composition of brass can be determined to verify the properties influenced by copper and zinc. Brass is a generic term for alloys of copper and zinc. The main technique used in this experiment is Spectroscopy....

...﻿Density of SolutionsLab
Purpose:
The purpose of this lab was to find out the densities of the known and unknown Solutions that were given to us. This can be found by dividing the mass by the volume of the Solutions. The other purpose of this lab was to perfect our skills in finding out the percentage error, uncertainties, random error, and systematic error.
Variables:
Independent: Mass Percentage of...

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